package cn.scw.common.utils;

import org.apache.commons.lang3.time.DateFormatUtils;

import java.lang.management.ManagementFactory;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * 时间工具类
 *
 * @author api
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils
{
    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM",
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 获取当前Date型日期
     *
     * @return Date() 当前日期
     */
    public static Date getNowDate()
    {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     *
     * @return String
     */
    public static String getDate()
    {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime()
    {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow()
    {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format)
    {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date)
    {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date)
    {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts)
    {
        try
        {
            return new SimpleDateFormat(format).parse(ts);
        }
        catch (ParseException e)
        {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str)
    {
        if (str == null)
        {
            return null;
        }
        try
        {
            return parseDate(str.toString(), parsePatterns);
        }
        catch (ParseException e)
        {
            return null;
        }
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate()
    {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算两个时间差
     */
    public static String getDatePoor(Date endDate, Date nowDate)
    {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - nowDate.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }

    public final static String start = "start";
    public final static String end = "end";


    /**
     * 对日期进行加减，天
     *
     * @param date 待处理日期
     * @param n    加减天数
     * @return 时间
     */
    public static Date addDay(Date date, int n) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.add(Calendar.DAY_OF_WEEK, n);
        return calendar.getTime();
    }

    /**
     * 对日期进行加减，月
     *
     * @param date 待处理日期
     * @param n    加减月数
     * @return 时间
     */
    public static Date addMonth(Date date, int n) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.add(Calendar.MONTH, n);
        return calendar.getTime();
    }

    /**
     * 对日期进行加减，年
     *
     * @param date 待处理日期
     * @param n    加减年数
     * @return 时间
     */
    public static Date addYear(Date date, int n) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.add(Calendar.YEAR, n);
        return calendar.getTime();
    }


    /**
     * 获取指定时间所在天的开始和结束时间
     */
    public static Date getDay(Date date, String status) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        int day = calendar.get(Calendar.DAY_OF_MONTH);
        if (start.equals(status)) {
            calendar.set(year, month, day, 0, 0, 0);
        } else {
            calendar.set(year, month, day, 23, 59, 59);
        }
        return calendar.getTime();
    }

    /**
     * 获取指定时间所在周的开始和结束天
     */
    public static Date getWeekDay(Date date, String status) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        int d = 0;
        if (cal.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) {
            d = -6;
        } else {
            d = 2 - cal.get(Calendar.DAY_OF_WEEK);
        }
        cal.add(Calendar.DAY_OF_WEEK, d);
        if (start.equals(status)) {
            return getDay(cal.getTime(), start);
        } else {
            cal.add(Calendar.DAY_OF_WEEK, 6);
            return getDay(cal.getTime(), end);
        }
    }

    /**
     * 获取指定时间所在月的开始和结束天
     */
    public static Date getMonthDay(Date date, String status) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        int last = 0;
        if (start.equals(status)) {
            last = cal.getActualMinimum(Calendar.DAY_OF_MONTH);
            cal.set(Calendar.DAY_OF_MONTH, last);
            return getDay(cal.getTime(), start);
        } else {
            last = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
            cal.set(Calendar.DAY_OF_MONTH, last);
            return getDay(cal.getTime(), end);
        }
    }

    public static String getTimestamp() {
        return String.valueOf(System.currentTimeMillis() / 1000);
    }

}
